Hyper-Local Accessibility Auditor

📋 Overview

Hyper-Local Accessibility Auditor is a professional web-based accessibility analysis tool designed for non-technical business owners and entrepreneurs. It analyzes website HTML files to identify WCAG accessibility compliance issues and generates comprehensive, human-friendly reports.

Problem it Solves

Many small business owners lack the technical expertise to evaluate their websites for accessibility. This tool eliminates that barrier by providing:

• Simple upload interface - No developer tools required
• Visual, intuitive results - Easy-to-understand dashboards
• Actionable recommendations - Clear steps to improve accessibility
• WCAG compliance tracking - Meet accessibility standards

What It Does

Analyzes websites for:

• ✅ Alt Text Analysis - Identifies missing or inadequate image descriptions
• ✅ Contrast Ratios - Verifies text/background contrast meets WCAG standards
• ✅ Readability Metrics - Measures text complexity using Flesch-Kincaid scores
• ✅ Semantic HTML - Checks for proper document structure
• ✅ Form Labels - Ensures all inputs have associated labels
• ✅ Heading Hierarchy - Validates H1-H6 structure
• ✅ Overall Score - Provides a 0-100 accessibility score

🚀 Features

Core Features

• Single-page application - Works entirely in the browser
• No backend required - All analysis runs client-side
• Professional dashboard - Beautiful, responsive card-based UI
• Local storage - Saves reports for later viewing
• Export options - Download reports as JSON, CSV, or HTML
• Mobile-friendly - Works on phones, tablets, and desktops

Advanced Features

• Flesch-Kincaid readability analysis - Professional-grade text metrics
• WCAG AA/AAA compliance checking - Industry-standard conformance
• Detailed issue logging - Shows exactly what needs fixing
• API-ready architecture - Built for future ML integration
• Accessibility-first design - The tool itself is accessible

📦 Tech Stack

Frontend

• HTML5 - Semantic markup
• CSS3 - Grid, Flexbox, clamp(), responsive design
• JavaScript (ES6+) - Modular class-based architecture
• DOMParser - Browser's built-in HTML parsing
• Canvas API - Image analysis capabilities

Browser Support

• Chrome/Edge (latest)
• Firefox (latest)
• Safari (latest)
• Mobile browsers

No External Dependencies

• Zero npm package requirements
• No build tools needed
• Works with just HTML, CSS, JavaScript
• Runs offline after first load

📁 Project Structure

accessibility-auditor/
│
├── index.html                 # Main application file
├── README.md                  # This file
│
├── css/
│   ├── styles.css            # Main styles & layout
│   ├── grid.css              # Responsive grid system
│   └── cards.css             # Card component styles
│
├── js/
│   ├── app.js                # Main app orchestration
│   ├── auditor.js            # Core audit engine
│   ├── contrastChecker.js    # WCAG contrast analysis
│   ├── readability.js        # Flesch-Kincaid calculator
│   ├── altTextChecker.js     # Image alt-text audit
│   ├── api.js                # API integration layer
│   └── export.js             # Report export utilities
│
├── assets/
│   └── icons/               # Icon assets (future)
│
└── sample/
    └── test.html            # Sample HTML for testing

🎯 How to Use

1. Open the Application

Simply open index.html in any modern web browser. No installation required.

# On Windows
start index.html

# On macOS
open index.html

# Or open in any browser

2. Upload an HTML File

• Click "Choose HTML File" or drag-drop an .html file
• Select your HTML file to analyze

3. Click "Scan Website"

The tool will:

• Parse your HTML
• Run all accessibility checks
• Generate a comprehensive report
• Display results in real-time

4. Review Results

• Overall Score - 0-100 accessibility rating
• 6 Category Cards - Detailed results for each audit type
• Summary Stats - Total and critical issues
• Detailed Log - Complete list of all findings

5. Download Report

Click "Download Report" to export results as JSON (or CSV/HTML with customization)

6. Take Action

Use recommendations to fix accessibility issues on your website

🔍 Audit Categories Explained

Alt Text Analysis

Why it matters: Blind and visually impaired users rely on alt text to understand images.

What it checks:

• Images without alt text (missing)
• Alt text that's too short (< 5 characters)
• Alt text that's just the filename
• Descriptive quality of alt text

Example:

<!-- ❌ Bad -->
<img src="photo.jpg" alt="image">

<!-- ✅ Good -->
<img src="photo.jpg" alt="Team of developers collaborating at a conference">

Contrast Ratio

Why it matters: Poor contrast makes text unreadable for users with color blindness or low vision.

What it checks:

• Color contrast between text and background
• WCAG AA compliance (4.5:1 for normal text, 3:1 for large)
• WCAG AAA compliance (7:1 for normal text, 4.5:1 for large)

Standards:

• Level AA (minimum): 4.5:1 contrast ratio
• Level AAA (enhanced): 7:1 contrast ratio

Readability Score

Why it matters: Complex text is hard to read for users with cognitive disabilities or ESL readers.

Metrics calculated:

• Flesch Reading Ease (0-100): Higher = easier to read
  • 90-100: Very easy (5th grade)
  • 60-70: Standard (8th-9th grade)
  • 0-30: Very difficult (college graduate)
• Flesch-Kincaid Grade Level: Estimated grade level needed
• Average sentence length: Longer = harder
• Average word length: Longer words = harder

Semantic HTML

Why it matters: Semantic markup helps screen readers understand page structure.

What it checks:

• Presence of <main>, <nav>, <header>, <footer>
• Proper use of structural elements
• Divs incorrectly used as buttons
• Document structure quality

Good practice:

<!-- ❌ Bad -->
<div onclick="navigate()">Menu</div>

<!-- ✅ Good -->
<nav>
  <button class="menu-toggle">Menu</button>
</nav>

Form Labels

Why it matters: Users with cognitive disabilities or screen readers need associated labels.

What it checks:

• All inputs have associated labels
• Labels use <label> element with for attribute
• Or inputs have aria-label or title attributes
• Proper semantic HTML form structure

Good practice:

<!-- ❌ Bad -->
<input type="email" placeholder="Email">

<!-- ✅ Good -->
<label for="email">Email Address</label>
<input type="email" id="email" required>

Heading Hierarchy

Why it matters: Proper heading structure helps users navigate and understand content.

What it checks:

• Exactly one H1 per page
• Proper heading hierarchy (H1 → H2 → H3)
• No skipped heading levels
• Headings used for structure, not styling

Good practice:

<!-- ❌ Bad -->
<h1>Page Title</h1>
<h3>Section</h3>  <!-- Skipped H2! -->

<!-- ✅ Good -->
<h1>Page Title</h1>
<h2>Main Section</h2>
<h3>Subsection</h3>

📊 Score Interpretation

Overall Score (0-100)

• 90-100: Excellent - Minimal accessibility issues
• 75-89: Good - Minor improvements needed
• 50-74: Fair - Significant work required
• 25-49: Poor - Major accessibility barriers
• 0-24: Critical - Severe accessibility problems

💾 Data & Privacy

Local Storage Only

• All analysis happens in your browser
• No data sent to external servers
• Reports stored in browser's localStorage
• Clear reports at any time

Report Export

• JSON: Complete structured data
• CSV: Spreadsheet-compatible format
• HTML: Formatted, printable report

🔧 Architecture

Modular Design

App (UI Management)
├── Auditor (Orchestration)
│   ├── ContrastChecker
│   ├── ReadabilityChecker
│   ├── AltTextChecker
│   ├── SemanticChecker
│   ├── FormChecker
│   └── HeadingChecker
├── API (External Integration)
└── Exporter (Report Generation)

Class-Based Architecture

Professional, scalable design with:

• Encapsulation of logic
• Clear separation of concerns
• Reusable components
• Easy testing and maintainability

🚀 Future Enhancements

Phase 2 Features

• Machine learning-based alt text suggestions (TensorFlow.js)
• Cloudinary API integration for image analysis
• Backend for report storage and history
• WCAG 2.2 compliance checking
• Performance metrics
• Keyboard navigation testing
• Color blindness simulation

Phase 3 Features

• Browser extension
• Automated batch scanning
• Team collaboration features
• Trends and progress tracking
• Custom compliance rules

📚 WCAG Standards Reference

This tool checks compliance with WCAG 2.1 (Web Content Accessibility Guidelines):

Key Principles:

1. Perceivable - Content must be perceivable to users
2. Operable - Content must be operable via keyboard
3. Understandable - Content must be understandable
4. Robust - Content must be robust enough for assistive technologies

Conformance Levels:

• Level A: Lowest compliance level
• Level AA: Mid-level compliance (most common target)
• Level AAA: Highest compliance level

For complete WCAG guidelines, visit: https://www.w3.org/WAI/WCAG21/quickref/

🧪 Testing

Sample HTML File

A test file is included at sample/test.html with intentional accessibility issues:

• Missing alt text
• Poor contrast ratios
• Complex readability
• Missing form labels
• Improper heading structure

Use this to test the auditor:

1. Open index.html
2. Click "Choose HTML File"
3. Select sample/test.html
4. Click "Scan Website"
5. Review the realistic results

Expected Results

The sample file should report:

• ~50-60 Overall Score
• Multiple images with missing alt text
• Low contrast issues
• Medium-high reading difficulty
• Missing form labels

🎓 Educational Value

Perfect for demonstrating:

• DOM Manipulation - Querying and analyzing HTML
• Computed Styles - Accessing element styling
• WCAG Compliance - Accessibility standards
• Algorithm Design - Readability calculations
• User Experience - Professional interfaces
• Business Value - Real-world applications

📋 Code Quality

Best Practices Implemented

• ✅ Error handling throughout
• ✅ Input validation
• ✅ Clear variable naming
• ✅ Comprehensive comments
• ✅ Accessible UI design
• ✅ Responsive layouts
• ✅ Performance optimization
• ✅ Cross-browser compatibility

🔐 Browser Compatibility

Browser	Version	Support
Chrome	Latest	✅ Full
Firefox	Latest	✅ Full
Safari	Latest	✅ Full
Edge	Latest	✅ Full
Mobile	Modern	✅ Full

📞 Support

Troubleshooting

"Failed to parse HTML"

• Ensure file is valid HTML
• Check for XML/XHTML issues
• Verify file encoding is UTF-8

"No results displayed"

• Check browser console for errors
• Ensure JavaScript is enabled
• Try a different HTML file

"File upload not working"

• Check file size (must be under 50MB)
• Verify .html file extension
• Clear browser cache and reload

📈 Performance

• File size: < 50KB total
• Load time: Instant
• Scan time: 100-500ms for typical pages
• Memory: < 10MB
• No external requests: Everything is local

🤝 Contributing

To improve this tool:

1. Test with real websites
2. Report issues you find
3. Suggest additional checks
4. Share successful use cases

📄 License

Created as an educational and professional tool for web accessibility.

🌍 Making the Web Accessible

Every website should be accessible to everyone, regardless of ability. This tool helps make that happen by:

• Making accessibility auditing easy
• Educating developers and business owners
• Lowering barriers to compliance
• Creating better experiences for all users

Help us make the web more accessible! 🎯

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Version: 1.0.0
Last Updated: February 2024
Created for: Professional developers & non-technical business owners